For non-geriatrics, stay away from all the unionized airlines.
I don't know about KLM, but Singapore, Air Malaysia, and ANA are up there. Lufthansa is staffed by sturdy Teutonic women if you are into that sort of thing...
I far prefer BA or Lufthansa to any of the US airlines I have flown internationally so far. Realllly hoping that some time when I fly to the UK for work (perhaps once a year from now on) I can get business class. My boss told me I have to try it once, and it definitely looks nice. But even though we have liberal price guidelines, the last time I flew it was too expensive.


(and her Ugg platforms are awesome!)